\begin{tikzpicture}
    \tkzDefPoints{0/0/O}
    \tkzDefPoint(130:1.5){A}
    \tkzDefPoint(210:1.5){B}
    \tkzDefPoint(330:1.5){C}
    \tkzDefPoint(70:1.5){D}
    \tkzDefPointOnLine[pos=1.4](B,C)  \tkzGetPoint{E}

    \tkzDrawCircle[thick](O,A)
    \tkzDrawPolygon(A,B,C,D)
    \tkzDrawSegments(B,E)
    \tkzDrawPoint(O)
    \tkzLabelPoints[right](O)
    \tkzLabelPoints[left, yshift=.3em](A)
    \tkzLabelPoints[left](B)
    \tkzLabelPoints[below right](C)
    \tkzLabelPoints[above](D)
    \tkzLabelPoints[below](E)
\end{tikzpicture}

